Question

Which of the following conditions is incorrect for $\psi$:

• A. $\psi$ must be single valued at any particular point
• B. $\psi$ must be finite
• C. $\psi$ must be positive
• D. $\psi$ must be a continuous function of its coordinates

Answer 1

The correct option is C $\psi$ must be positive

$\psi$ can be negative, positive or zero.